Did a RAM Module Just Fail?

Discussion in 'Mac Pro' started by FluJunkie, Mar 27, 2011.

  1. FluJunkie macrumors 6502a

    Jul 17, 2007
    So, I've not been restarting my Mac Pro for at least a few weeks, because...well, why bother? But, I returned from a trip and the 10.6.7 upgrade was out, so I ran software update, restarted and...

    The memory configuration utility cheerfully informed me my RAM was in the suggested configuration. Odd I thought, since I hadn't changed it. Then when I went to System Profiler...I have 6 gigs of RAM.

    Except there's supposed to be 10.

    Slot 1 and 2 are occupied by 4 GB modules from OWC, and 3 and 4 are occupied by 2 of the stock 1 GB modules from Apple. Slot 1 is currently being reported by System Profiler as Empty. I booted from the Install CD to make sure it wasn't the new update - same thing, as it is in Windows 7.

    So...did I just have a RAM module fail?
  2. SandboxGeneral Moderator emeritus


    Sep 8, 2010
  3. FluJunkie thread starter macrumors 6502a

    Jul 17, 2007
    Memtest ran fine, and everything checked out - save that it too cannot see the missing module. Time to unplug, cool off, reseat, and then call OWC I suppose.
  4. scottsjack macrumors 68000

    Aug 25, 2010
    I had that happen on my 2010 quad with 3 x 4GB OWC memory. After a few warnings the red LED on slot #2 came on. I switched the RAM cards between slots 1 and 2. Everything has worked fine since.
  5. FluJunkie thread starter macrumors 6502a

    Jul 17, 2007
    Swapped two of the modules, and sure enough, one of them is dead - and failed silently, which is odd.

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